HP, FLA, PF and EFF PROGRAMMING CONSIDERATIONS
When programming the 777-AccuPower, the accuracy of the motor output power is dependent on
the motor information entered into the unit.
When the horsepower (HP), full load amps (FLA), or power factor (PF) of the motor are
programmed, the 777-AccuPower calculates the motor efficiency. If the rated efficiency of the motor
is known, EFF should be manually programmed—this will provide the most accurate motor output
power estimation.
If EFF is programmed, FLA and PF should be left at 0 and P00.
Table 3 shows output power accuracy—most to least—based on programmed motor information.
HP FLA PF
EFF
MOTOR OUTPUT POWER
Required 0
P00
Manually
Programmed
MOST ACCURATE
Required Entered Entered Automatically
Calculated
BETTER
Required Entered
P00 Automatically
Calculated
BETTER
Required 0
P00
Automatically
Calculated
LEAST ACCURATE
Table 3. Motor Output Power Accuracy
PROGRAMMING
1.
Rotate the MODE SELECT switch to the parameter to be programmed. SymCom
recommends that MULT be programmed first, then move clockwise through the positions
to complete the process.
2.
Press and hold the RESET/PROGRAM button.
3.
Rotate the DISPLAY/PROGRAM knob until the proper setting for the parameter that is
being programmed is displayed.
4.
Release the RESET/PROGRAM button. This stores the new parameter in the nonvolatile
memory.
If a setting jumps back to its previous setpoint when changed, the tamper
guard is locked
and must be unlocked before programming can be completed (see page
14 for tamper guard procedures).
5.
Continue steps 1-4 until all parameters are programmed.
OPERATION
The relay operation of the Model 777-AccuPower is designed to be fail safe. This means when
everything is within the limits programmed into the unit, the relay will energize; the NO (normally
open) contact will close and the NC (normally closed) contact will open. Once the unit has been
wired and programmed, the unit is ready to operate. Turn MODE SELECT to RUN. The display will
show “run” alternating with some number (the numbers displayed will be the number corresponding
to where the DISPLAY/PROGRAM knob is pointed). It will do this for the amount of time
programmed into RD1. After this time has expired, the relay will energize (NO contact will close and
NC contact will open). If something else is displayed, see the TROUBLESHOOTING section for
more information. If MODE SELECT is turned out of the RUN position, the relay will de-energize.
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